Olive-green sulfur dye.



'nnrrnn s'rntrns PATENT @FETQE JOSEPH FLACHSLAENDER AND KARL PAUL G'RRLE'RT, 0F ELBERFELQ AND MAX BUFF, OI VOHWI'NKEL, NEAR ELEERFELD, GERMANY, ASSIGNOM '10 FAKBENFABEIKEN VORM. FRIEDB. BAYER &; (30., OF ELBERFELD, GERMANY, A CORPORATION OI? GERMANY. OLIVE-GREEN SULFUR 1,081,600., Specification of Letters Patent No Drawing.

IilH: NH;

(in which X means a phenolic radical) or the corresponding indophenols producedby 1:8-na hthylenediamin with condensing or its substitution proquinone chlorimid ducts containing methyl, chlorin, etc.) The melt can also be carried out with the addition of copper or a copper compound.

The new dyes are after being dried and pulverized dark powders soluble in a solu tion of sodium sulfid generally with a green coloration and practically insoluble in concentrated sulfuric acid. They dye cotton in olive-green shades distinguished by their fastness to boiling and to light.

In order to illustrate the new process more fully the parts being by weight parts of calcined sodium sulfid, 50 parts of sulfur, 30.15 parts of leucoindophenol hydrochlorid' derived from 1.8-naphthylenediamin and para-aminophenol, 10 parts of copper sul fate and 150 parts of alcohol are bolled during 48 hours in a vessel provided with a reflux condenser. The alcohol is then distilled ofi, the residueis dissolved in water and the dysteufl" is isolated from solution by precipitation with air or acld. The new coloring matter is after being dried and pulverized a dark powder soluble in a the following example is given,

Patented Dec. re, 1913.

Application filed October 8, 1912. Serial No. 724,628.

sodium sulfid solution with a bluish-green, coloration. It is practically insoluble in concentrated sulfuric acid and issoluble in green coloration. It dyes cotton in pure olive-green shades fast to light and to boiling. In the same Way leucoindophenol bases substituted in the benzene nucleus by other substituents or the corresponding indophenols can be used.

The above mentioned quantities of sodium sulfid and of sulfur as well as the temperature and the duration of the reaction can be varied within wide limits.

We claim 1. The herein described new sulfur dyes being sulfur-containing derivatives of leucoindophenols of the formula: I

' 7 NH, NH:

.in which X means a phenolic radical, which are after being dried and pulverized dark powders being soluble in a solution of sodiuni sulfid generally with a green coloration; being practically insoluble in concentrated sulfuric acid; and dyeing unmordanted cotton olive-green shades fast to light and to boiling, substantially as described.

2. The herein described new sulfur dye leucoindophenol of the formula:

H which dye is after being dried and pulverhot caustic soda lye (30 B.) with a dark being a sulfur-containing derivative of the ized a dark powrler soluble in a sodium I set our hands in the presence of two sub- 10 sulfid solution with e bluish-green colorar tion; practically insoluble in concentrated sulfuric acid; soluble in hot-caustic soda lye (30 B6.) wlth a dark green coloration; and dyeing uninordanted cotton 1n pure olive-green shades fast to light and, ts boiling, substantially as described.

In testimony whereof We have hereunto scribing witnesses JOSEPH FLAfiHSLAElDE v. 1a. 3. KARL PAUL emmm'. u. s]

THAI: RUFF. [L. 8-] Witnesses:

ALBERT NUFER, GUsTAVE NAVARRETE, 

